<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div @mouseleave="moveOutDiv" @mouseenter="isShow=true">
        <h2 class="all">全部商品分类</h2>
        <transition name="sort">
          <div class="sort" v-show="isShow">
            <div class="all-sort-list2" @click="toSearch">
              <div class="item"
                   @mouseenter="moveInItem(c1.categoryId)"
                   :class="{item_on:currentId===c1.categoryId}"
                   v-for="c1 in categoryList" :key="c1.categoryId">
                <h3>
                  <a href="javascript:;" :data-categoryName="c1.categoryName"
                     :data-category1Id="c1.categoryId">{{ c1.categoryName }}</a>
                </h3>
                <div class="item-list clearfix">
                  <div class="subitem">
                    <dl class="fore" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                      <dt>
                        <a href="javascript:;" :data-categoryName="c2.categoryName"
                           :data-category2Id="c2.categoryId">{{ c2.categoryName }}</a>
                      </dt>
                      <dd>
                        <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                          <a href="javascript:;" :data-categoryName="c3.categoryName" :data-category3Id="c3.categoryId">{{
                              c3.categoryName
                            }}</a>
                        </em>

                      </dd>
                    </dl>
                  </div>
                </div>
              </div>

            </div>
          </div>
        </transition>

      </div>

      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>

    </div>
  </div>
</template>

<script>
import {mapState} from 'vuex';
import throttle from 'lodash/throttle';

export default {
  name: "TypeNav",
  data() {
    return {
      //移入变色参考值
      currentId: -1,
      //控制三级列表左侧菜单是否显示
      isShow: true
    }
  },
  computed: {
    ...mapState({
      categoryList: state => state.home.categoryList,
    }),
  },

  methods: {
    moveInItem: throttle(function (id) {
      this.currentId = id;
    }, 10, {trailing: false}),

    //离开三级菜单区域
    moveOutDiv() {
      this.currentId = -1;
      if (this.$route.path !== '/home') {
        this.isShow = false;
      }
    },
    //点击三级标签内的a标签跳转搜索
    toSearch(event) {
      // console.log(event)
      const {categoryname, category1id, category2id, category3id} = event.target.dataset;
      //如果存在categoryname属性，则说明必定是a标签
      if (categoryname) {
        const location = {
          name: 'Search',
          query: {
            categoryName: categoryname
          }
        }
        //category1id,category2id,category3id谁存在把相应的ID发过去
        if(category1id){
          location.query.category1Id=category1id;
        }
        if(category2id){
          location.query.category2Id=category2id;
        }
        if(category3id){
          location.query.category3Id=category3id;
        }
        //如果此时还存在params参数，讲params参数一起发送，进行混合查询
        location.params=this.$route.params;


      this.$router.push(location);

    }

  }

}
,
mounted()
{
  if (this.$route.path !== '/home') {
    this.isShow = false;
  }
}
}
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      background: skyblue;
      z-index: 999;

      //添加显示隐藏过渡效果
      &.sort-enter, &.sort-leave-to {
        height: 0;
        opacity: 0;
      }

      &.sort-enter-to, &.sort-leave {
        height: 461px;
        opacity: 1;
      }

      &.sort-enter-active, &.sort-leave-active {
        transition: all 0.3s;
      }

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 550px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &.item_on {
            background-color: pink;

            .item-list {
              display: block;
            }
          }

          //&:hover {
          //  background-color: pink;
          //  .item-list {
          //    display: block;
          //  }
          //}
        }
      }
    }
  }
}

</style>
